:root {
  color-scheme: light dark;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  line-height: 1.65;
  --bg: #f6f8fc;
  --card: #ffffff;
  --text: #172033;
  --muted: #5f6b7a;
  --accent: #2457e6;
  --border: #dce2ed;
}

@media (prefers-color-scheme: dark) {
  :root { --bg: #111827; --card: #182235; --text: #eef2ff; --muted: #bdc7d8; --border: #344158; }
}

* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); }
main { width: min(920px, calc(100% - 32px)); margin: 32px auto; padding: 40px; background: var(--card); border: 1px solid var(--border); border-radius: 16px; }
h1 { line-height: 1.2; margin-top: 0; }
h2 { margin-top: 2rem; border-top: 1px solid var(--border); padding-top: 1.25rem; }
h3 { margin-top: 1.35rem; }
a { color: var(--accent); }
.meta, .note { color: var(--muted); }
.notice { padding: 16px 18px; border-left: 4px solid var(--accent); background: color-mix(in srgb, var(--accent) 8%, transparent); border-radius: 8px; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 24px 0; }
.button { display: inline-block; padding: 12px 18px; color: white; background: var(--accent); border-radius: 8px; text-decoration: none; font-weight: 650; }
.button { border: 0; cursor: pointer; font: inherit; }
.button:disabled { cursor: wait; opacity: .65; }
form { display: grid; gap: 10px; margin: 24px 0; padding: 22px; border: 1px solid var(--border); border-radius: 12px; }
label { font-weight: 650; }
input, select { width: 100%; padding: 11px 12px; color: var(--text); background: var(--card); border: 1px solid var(--border); border-radius: 8px; font: inherit; }
.field-help { margin: -5px 0 7px; color: var(--muted); font-size: .9rem; }
.checkbox { display: flex; align-items: flex-start; gap: 10px; margin: 8px 0; font-weight: 400; }
.checkbox input { width: auto; margin-top: .4rem; }
.form-status { min-height: 1.6em; padding-top: 4px; overflow-wrap: anywhere; }
.form-status.success { color: #18763a; }
.form-status.error { color: #c62828; }
nav { margin-bottom: 24px; }
nav a { margin-right: 16px; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; vertical-align: top; padding: 10px; border: 1px solid var(--border); }
@media (max-width: 640px) { main { margin: 0; width: 100%; padding: 24px 18px; border: 0; border-radius: 0; } table { font-size: .9rem; } }